Loom for weaving terry



June 8, 1937.4 A. J. l-u.-.RAR|: JR., Er Al. 2,082,888

LOOM FOR WEAVING TERRY Filed Dec. 9, 1935 2 sheets-sheet 1 m0 7 CarI F.Berqstmm June 8, 1937. A. J. HERARD, JR., ET A1. 2,082,888

VLOOM FOR WEAVING TERRY Filed Dec. 9, 1955 2 Sheei,.'s-Shee1'l 2Archibald J. Herard, Jr. Carl P. Bergstrom Attorneys` Patented `lune 8,1937 UNITE PATENT OFFICE LooM FOR WEAvING TERRY Application December 9,1935, serial No. 53,456

1 Claim.

` respect to the `fell when the lay is on front center, but at othertimes the reed moves up to the fell, the terry warp being momentarilyslackened so that the portion of said warp extending between the felland the previously laid picks of filling with the reed relativelyrearwardly can be moved to form the pile characteristic of terry fabric.As heretofore made looms of this type have generally been constructedfor a single height of pile and such variation as was obtained dependedupon rather unsatisfactory adjustments of the connecter between the reedand the reed controller. It is an important objectl of our presentinvention to' provide means for determining the reed position relativelyto the lay in, conjunction with adjusting means to vary the extent ofmovement of the reed relatively to the lay on terry forming beats of theloom.

In the form of the invention illustrated herein the reed is controlledby a toggle joint interposed between the lower part of the reed and apivot lfixed with respect to the lay. The joint is controlled by adepending rod connected at its lower end to a control or positioninglever fastened to a rocking shaft. A cam operated by reduction gearingis provided to effect periodic breaking `of the toggle joint by means ofa lever cooperating with the cam and transmitting its motion to thecontrol lever through the rocker shaft. `It is an important object ofour present invention to provide means whereby the cam lever is moved tothe same extreme position for each complete revolution of the cam butwherein the total throw of the lever will be variable, generallysomewhat less than the motion of the cam. Ad-

justing means are` provided to permit the lever to provide means forpermitting the weaving either of terry or plain fabric, this meansincluding a coupling to be interposed between the toggle and the camlever when terry fabric is tobe woven and to be movedto non-operating orun- 'coupled position to prevent the cam and its lever from altering theposition of the reed when it is desired to weave plain or non-pilefabric, as headings. This coupling is so related to the severalcooperating parts that the adjustments of the latter do not interferewith the coupling and uncouping action described.

A further object of the invention is to provide a single adjustmentwhich will give equal motions to both ends of the reed. Where individualadjustments at each end are used, as formerly, there is likelihood thatone end will move more than the other, causing unevenness of the fabric.With these and other objects in view which will appear as thedescription proceeds, our invention resides in the combination andarrangement of parts hereinafter described and set forth.

In the accompanying drawings, wherein a convenient embodiment our ourinvention is set forth,

Fig. 1 is a transverse vertical section through a loom having ourinvention applied thereto with the lay in forward position but with thereed in relative backward position,

Fig. 2 is a top plan view taken in the direction of arrow 2, Fig. 1 onan enlarged scale,

Fig. 3 is an operating View showing parts of Fig. 1 with the lay backand the reed in shuttle guiding position with the toggle straight,

Fig. 4 is a View similar to a part of Fig. 1, but with the togglestraightened to place the reed for a terry beat-up stroke,

Fig. 5 is a view of the lower part of Fig. 4 showing the relation of thecam operated parts when a heading is to be woven of plain non-pilefabric, Fig. 6 is a vertical section on line 6--6 of Fig. l, on anenlarged scale,

, Fig. 7 is a vertical section on line 'I-'I, Fig. 2, and

Fig. 8 is a diagrammatic plan on a reduced scale of Fig. 1.

Referring to Fig. l, the loom frame I0 has a breast beam II and a lay I2pivoted about a rocker shaft I3 at the lower part of the loom. At eachend of the loom a lay end I4 is pivotally connected to the forward endof a connecter rod I5 reciprocated by wrist pin I6 of a top shaft I'I. Areed I8 is mounted between a lower backstay I9 and an upper hand rail20, the backstay, rail and reed being held together at each end by aframework 2| which moves pivotally about axes 22 supported by a lay endI4.

At each side of the loom there is a toggle joint for determining theposition of the reed and since -both toggles and their connections arealike, only one will be described. A toggle link 25 is pivoted as at 26to the frame 2l and pivotally connected as at 2l to an operating link orlever 28. The latter pivots about an axis 29 carried by a block 38having a forwardly extending shank 3l which fits into a bearing 32 ofthe lay end and held in an adjusted position by a set screw 33. The link28 has a rearwardly extending arm 35 to which is attached the upper endof a tension spring 36 the lower end of which is fastened as at 3l to alay sword 38. The forwardly extending arm 33 of the link 28 is formedwith a shoulder 48 to abut an adjusting screw 4l in link 25 when thetoggle is in straight, 0r terry pile forming position. A controlconnecter'42 is pivoted as at 43 to the link 39 and extends downwardly.

If the fabric being woven is the so-called three pick terry the reedwill loe in the position shown in Fig. l for two successive beats whenthe lay is in forward position, but when the third forward beat occursthe connecter 42 will rise to straighten the toggle so that the partswill assume the position shown in the upper portion of Fig. 4 to beatthe loops of terry to the fell of the cloth.

A control mechanism for both toggle joints is shown in the lower part ofFig. l. The regular loom bottom shaft 45 carries a gear 46 which mesheswith a second larger gear 41 on a stub shaft 48. The latter is supportedin suitable bearings and in the present instance will have a completerotation every third beat of the lay, the gearing between the bottom andstub shafts and also between the bottom and top shafts being in properproportion to accomplish this result. Se-

cured to the stub shaft 48 is a cam 58 having a high dwell area 5l and alow dwell area 52 from which extend inclined surfaces 53 between whichisa pocket or recess 54.

A rocker shaft 68 mounted for rotation in suitable bearings fixed withrespect to the loom frame has loosely pivoted thereon hub 6l of a camlever 62 carrying a roll 63. The latter is supported on a stud 64adjustable toward and from the rocker shaft in a slotted end 65 of thecam lever. A light tension spring 66 is interposed between a horn 6l andthe cam lever to urge the roll toward the cam.

Collar il is secured on the rocker shaft 68 by vset screws l2. Atransmitting lever 18, supporting the previously described horn 61, hasan oset Y'i3 to extend over the cam lever and limit upward movementthereof relatively to the transmitting lever.

A rearwardly extending arm 'l5 on the'transmitting lever has pivotedthereto at 16 a coupling key Tl and as indicated in Fig. 2 there isinterposed between the key and the arm 'l5 a compression spring 78 theeffect of which is to urge the` forward end of the key Tl toward the camlever. The coupling key is provided with a lifting head 19 which extendsthrough a slot 80 in the transmitting lever to project below and intothe path of the cam lever.

The transmitting lever has a hub 85 on the rocker shaft from whichextends upwardly and rearwardly a horn 85, and a similar horn 8'! on thecollar l! is connected to the horn 86 by means of bolt 88 extendingthrough the horns 86 and 81. An arcuate slot 89 is formed in the horn 86so that the angular position of the transmitting lever with respect tothe rocker shaft and collar ll can be altered.

As seen in Fig. S there are two control levers 98 secured to the rockershaft and extending forwardly, each having a connection 9i with aconnecter 42. A cord |88 controlled by the pattern mechanism not shownis attached to the coupler key 'Vl to pull the latter from under the camlever when a plain heading is to be woven.

In operation, the crank shaft l'l rotates once for each pick of the loomto move the lay back and forth and the cam 58 will complete a rotationonce for every three revolutions of the crank shaft. When the lay is inrear position as shown in Fig. 3 the spring 36 will straighten thetoggle joint so that the reed will be forward to support the shuttlewhen it is in flight, this condition occurring every beat of the loom.Spring 36, acting through link will also hold the levers on shaft 68raised. On non-terrying forward strokes of the lay the cam 58 will be insuch a position that high dwell 5l will arrest up motion of the roll 63as the lay advances, and the cam lever, acting through head 'l9, willhold the transmitting lever depressed, which in turn acts through thebolted horns 86 and 8l and the set screws 'l2 and collar 'H to preventfurther rocking of the rocker shaft. The eifect of this is to holdlevers 98 down as the lay moves forwardly, thereby preventing theconnecters 42 from rising to high position, and effecting a braking ofthe toggles to position the reed as shown in Fig. l.

This relation exists for two successive beats of the loom, but on thethird beat, the pocket or recess 54 of the cam is over the roll 63 andas the lay moves forwardly the roll rises into the pocket and the cam isineffective to over-power the springs 36 to brake the toggles. Thelatter therefore remain straight and the reed has a terry pile formingmovement, assuming the position shown in Fig. 4 relatively to the lay.

These operations will continue so long as it iS desired to weave terryfabric, but when a heading is called for by the pattern mechanism thecord |88 will pull the coupling key 'Il to move the head 19 out ofvertical alignment with the cam lever to permit the latter to movedownwardly without causing any movement of the transmitting lever, assuggested in Fig. 5. The levers 98 and connecters 42 therefore remain upeach beat of the lay so long as a heading is being woven.

When it is desired to alter the height of pile it will be necessary tochange the extent to which the toggle joints are broken, but this shouldpreferably be done without disturbing the two levers 98, since anyunevenness in their setting will cause imperfect cloth. 'Ihe adjustmentmay be accomplished by loosening the bolt 88 and effecting a relativeangular motion between the horns 86 and 8l. If it is desired forinstance to have a greater height of loop, it will be necessary todepress the connecter 42 below its former position, and this can beaccomplished by turning the transmitting lever about the rocker shaft ina left hand direction as viewed in Fig. l, the cam being in the positionof Fig. 4, after which the bolt 88 is tightened. This will cause thedwell 5I to give the rocker shaft a greater angular motion, causing alonger sweep of levers 98. Similarly, a reverse adjustment can be usedwhen it is desired to weave a fabric having a lower pile. Y

vWhatever the relative position of the horns 86 and 8l to effect varyingheights of pile, the relation between the coupling head 19, thetransmitting lever, and the cam lever will remain the same, since offset13 and head 18, both on the transmitting lever limit vertical motion ofthe cam lever relatively to lever 18. The only difference will be thatwhen a higher pile is to be woven the roll 63 will rise to a somewhathigher position in the pocket 54 when the parts are in the positionshown in Fig. 4. It will be understood from this that the extent of thethrow which can be given by the inclined surfaces 53 of the cam 50 tothe cam lever through the roll 63 is varied by altering the relativeposition of the horns 86 and 8'|,and that a single adjustment at thetransmitting lever affects both levers 90.

Having thus described our invention it will be seen that changes andmodifications may be made therein by those skilled in the art withoutdeparting from the spirit and scope of the invention, and we do not wishto be limited to the details herein disclosed, but what we claim is:

In a terry fabric loom having a lay, a reed capable of assuming twodifferent positions relatively to the lay when the latter is forward, aregularly rotating cam having a high dwell and a recess interruptingsaid dwell, a rocker shaft, a cam lever mounted on and movable about therocker shaft as a pivot under action of the cam, a transmitting leveralso mounted on the rocker shaft, and having a part with an arcuate slotconcentric with the shaft, a collar on the rocker shaft, an arm on thecollar adjacent that part of the transmitting lever having the slot,bolting means passing through the arm and extending through the slot; tohold the transmitting lever and collar in any one of a plurality ofrelative angular positions with respect to each other about the rockershaft, the transmitting lever capable of turning on the shaft relativelythereto when the bolting means is loosened, means to secure the collarpermanently to the shaft in a given position for all angular positionsof the transmitting lever relatively to the shaft, the cam lever toassume a plurality of different positions with respect to the recess ofthe cam depending upon the relative angular relation of the transmittinglever and collar, means to transmit an actuating force from the camlever to the transmitting lever, and spaced means carried by the rockershaft and operatively connected to the reed at spaced points to causethe latter to assume one or the other of its positions relatively to thelay when the latter is forward.

ARCHIBALD J. HERARD, JR. CARL P. BERGSTROM.

